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<div>{{Refimprove|date=December 2009}}<br />
The '''''Q''<sub>10</sub> temperature coefficient''' is a measure of the rate of change of a biological or chemical system as a consequence of increasing the [[temperature]] by 10 °C. There are many examples where the ''Q''<sub>10</sub> is used, one being the calculation of the [[nerve conduction velocity]] and another being calculating the contraction velocity of [[muscle fibre]]s. It can also be applied to [[chemical reaction]]s and many other systems.<br />
<br />
The ''Q''<sub>10</sub> is calculated as:<br />
<br />
: <math>Q_{10}=\left( \frac{R_2}{R_1} \right )^{10/(T_2-T_1) }</math><br />
<br />
where <br />
: ''R'' is the rate<br />
: ''T'' is the temperature in [[Celsius]] degrees or [[kelvin]]s.<br />
<br />
''Q''<sub>10</sub> is a unitless quantity, as it is the factor by which a rate changes, and is a useful way to express the temperature dependence of a process.<br />
<br />
For most biological systems, the ''Q''<sub>10</sub> value is ~ 2 to 3.<ref>''Reyes, A.B., Pendergast, J.S., and Yamazaki, S. 2008. Mammalian peripheral circadian oscillators are temperature compensated. J. Biol. Rhythms 23: 95-98.''</ref><br />
<br />
==See also==<br />
* [[Arrhenius equation]]<br />
* [[Arrhenius plot]]<br />
<br />
==References==<br />
<references /><br />
<br />
==External links==<br />
* [http://www.physiologyweb.com/calculators/q10_calculator.html Temperature Coefficient (Q<sub>10</sub>) Calculator]<br />
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{{DEFAULTSORT:Q10 (Temperature Coefficient)}}<br />
[[Category:Ecological metrics]]<br />
[[Category:Chemical kinetics]]</div>87.254.92.120